postgres not starting

Restore a backup or reinstall Postgres. The default Postgres data tables need to be there and owned by the user Postgres runs as.

On Thu, 2018-02-15 at 18:21 -0600, Azimuddin Mohammed wrote:

Hello,
I am unable to start postgres on one of the server
I am getting below error "HINT: is another postmaster already running
on port 5432, if not wait a few seconds and retry"
I checked the processes nothing is running with postgres

I think the error caused because I removed everything under /data
directory before stopping the server.
Can someone help.

kill -9 the old processes. The old postmaster is holding onto the port.
And probably some of the old file handles, too, so you might want to
re-init the new database cluster after really cleaning up the old one.

Alan Hodgson wrote:

On Thu, 2018-02-15 at 18:21 -0600, Azimuddin Mohammed wrote:

Hello,
I am unable to start postgres on one of the server
I am getting below error "HINT: is another postmaster already running on port 5432, if not wait a few seconds and retry"
I checked the processes nothing is running with postgres

I think the error caused because I removed everything under /data directory before stopping the server.
Can someone help.

kill -9 the old processes. The old postmaster is holding onto the port.
And probably some of the old file handles, too, so you might want to re-init the new database
cluster after really cleaning up the old one.

This seems excessive - maybe the server he wants to start is already
running and there is no need to crash or wipe it.

To give a better answer we would have to know which operating system
it is, which PostgreSQL version and how it was installed.

Yours,
Laurenz Albe
--
Cybertec | https://www.cybertec-postgresql.com

The poster writes ....

" I think the error caused because I removed everything under /data
directory before stopping the server. "

If you did remove the data directory, you will need to kill any processes
hanging on then initdb -D /your/data/directory

Without a data directory it will not start.

On Thu, Feb 15, 2018 at 8:51 PM, Laurenz Albe <laurenz.albe@cybertec.at>
wrote:

Alan Hodgson wrote:

On Thu, 2018-02-15 at 18:21 -0600, Azimuddin Mohammed wrote:

Hello,
I am unable to start postgres on one of the server
I am getting below error "HINT: is another postmaster already running

on port 5432, if not wait a few seconds and retry"

I checked the processes nothing is running with postgres

I think the error caused because I removed everything under /data

directory before stopping the server.

Can someone help.

kill -9 the old processes. The old postmaster is holding onto the port.
And probably some of the old file handles, too, so you might want to

re-init the new database

cluster after really cleaning up the old one.

This seems excessive - maybe the server he wants to start is already
running and there is no need to crash or wipe it.

To give a better answer we would have to know which operating system
it is, which PostgreSQL version and how it was installed.

Yours,
Laurenz Albe
--
Cybertec | https://www.cybertec-postgresql.com

--
Thanks,

Jorge Torralba
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I wrote:

Alan Hodgson wrote:

On Thu, 2018-02-15 at 18:21 -0600, Azimuddin Mohammed wrote:

Hello,
I am unable to start postgres on one of the server
I am getting below error "HINT: is another postmaster already running on port 5432, if not wait a few seconds and retry"
I checked the processes nothing is running with postgres

I think the error caused because I removed everything under /data directory before stopping the server.
Can someone help.

kill -9 the old processes. The old postmaster is holding onto the port.
And probably some of the old file handles, too, so you might want to re-init the new database
cluster after really cleaning up the old one.

This seems excessive - maybe the server he wants to start is already
running and there is no need to crash or wipe it.

Apologies - I didn't see the part that "nothing is running".

To find the process that is blocking the port, you can run the following:

lsof -i TCP:5432

Yours,
Laurenz Albe
--
Cybertec | https://www.cybertec-postgresql.com

I do not see anything running

On Feb 15, 2018 11:00 PM, "Laurenz Albe" <laurenz.albe@cybertec.at> wrote:

Azimuddin Mohammed wrote:

I am unable to start postgres on one of the server
I am getting below error "HINT: is another postmaster already running on port 5432, if not wait a few seconds and retry"
I checked the processes nothing is running with postgres

To find the process that is blocking the port, you can run the following:

lsof -i TCP:5432

I do not see anything running

Then the problem is something else.

Try to start PostgreSQL directly as OS user "postgres" with

postgres

(This requires that the environment variable PGDATA is set to the data directory.)

Then post all the messages you see.

Yours,
Laurenz Albe
--
Cybertec | https://www.cybertec-postgresql.com